Digital audio system



FIG. 1 is a perspective view of a digital audio system;

FIG. 2 is a front view of the digital audio system of FIG. 1;

FIG. 3 is a rear view of the digital audio system of FIG. 1;

FIG. 4 is a left-side view of the digital audio system of FIG. 1;

FIG. 5 is a right-side view of the digital audio system of FIG. 1;

FIG. 6 is a top plan view of the digital audio system of FIG. 1; and,

FIG. 7 is a bottom plan view of the digital audio system of FIG. 1.

Elements shown on a recessed area on FIG. 3 in broken lines are forillustrative purposes only and form no part of the claimed design.

The ornamental design for a digital audio system, as shown anddescribed.